This Safety Guide provides recommendations on how to meet the applicable safety requirements in relation to the design aspects of new nuclear installations subjected to seismic hazard. These recommendations focus on the consistent application of methods and procedures, in accordance with best practice, for seismic analysis, design, testing and qualification of structures, systems and components. New recommendations include applications of seismic isolation systems, the seismic margin to be achieved by the design and application of the graded approach. This Safety Guide is intended for use by organizations involved in the seismic design of nuclear installations, in analysis, verification and review, and in the provision of technical support, as well as by regulatory bodies.

• 1. INTRODUCTION
  • Background
  • Objective
  • Scope
  • Structure
• 2. REQUIREMENTS FOR SEISMIC DESIGN AND GENERAL SEISMIC DESIGN ASPECTS
  • External hazards
  • Engineering design rules
  • Design extension conditions
  • Heat transfer to an ultimate heat sink
  • Control room
  • Other seismic design aspects
• 3. INPUT FOR SEISMIC DESIGN
  • General concepts of seismic design
  • Design basis earthquake
    • Required input from the site evaluation process
    • Final site response analysis for the seismic hazard assessment
    • Determination of the design basis earthquake
  • Beyond design basis earthquake
  • Seismic categorization for structures, systems and components
  • Selection of seismic design and qualification standards
• 4. SEISMIC DESIGN OF STRUCTURES, SYSTEMS AND COMPONENTS
  • Layout of the installation
  • Buildings and civil structures
  • Engineered earth structures and buried structures
  • Seismically isolated structures
  • Mechanical equipment
  • Storage tanks
  • Piping
  • Buried pipes
  • Electrical equipment, control and instrumentation
  • Cable trays and conduits
  • Heating, ventilation and air-conditioning ducts
  • Seismic capacity
• 5. SEISMIC ANALYSIS
  • Site response analysis
  • Structural response
  • Dynamic soil–structure interaction
    • Direct methods
    • Substructuring methods
    • Structure–soil–structure interaction
  • Combination of earthquake loads with other loads
• 6. SEISMIC QUALIFICATION
  • Qualification methods
  • Qualification by analysis
  • Qualification by testing
    • Types of test and typical application fields
    • Planning
  • Qualification by a combination of analysis and testing
  • Qualification by indirect methods
• 7. SEISMIC MARGIN TO BE ACHIEVED BY THE DESIGN
  • Concept of seismic margin
  • Adequate seismic margin
  • Procedures to assess the seismic margin
• 8. SEISMIC INSTRUMENTATION AND POST-EARTHQUAKE ACTIONS
  • Seismic instrumentation
  • Post-earthquake actions
• 9. SEISMIC DESIGN FOR NUCLEAR INSTALLATIONS OTHER THAN NUCLEAR POWER PLANTS
• 10. APPLICATION OF THE MANAGEMENT SYSTEM
• REFERENCES
• DEFINITIONS
• CONTRIBUTORS TO DRAFTING AND REVIEW